Ryobi HM-3400 Owner'S Operating Manual Download Page 5

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CUTTING HEIGHT ADJUSTMENT (Fig. 5 – 7)

The mower employs a manual method of cutting height 

adjustment. The method involves changing the arrangement 

of the spacers fitted between the impeller and the blade.

The procedure for adjusting the height of cut is as follows:
  1. Ensure your mower is disconnected from the mains 

supply.

  2. Turn your mower over onto its side so that the underside 

of the cutter cover is exposed.

  3. Using a cloth placed over the blades or heavy-duty 

gloves to protect your hands, grip the blade and, using 

the spanner (16) provided, loosen and remove the blade 

fixing nut (17) from the motor spindle. Turn the blade 

fixing nut in anti-clockwise direction to loosen it.

  4. Remove the blade fixing nut, spacers (18) and blade (19) 

and re-assemble to give the cut height required, showing 

the 3 cut heights available.

  5. Once the cut height is selected, re-assemble the blade; 

ensuring the cutter blade is assembled with the cutting 

tips downward.

  6. Ensure the blade nut is tight.

Note:

 Always re-fit 2 spacers and never fit more or the mower 

will become unsafe.

SECURE THE CABLE (Fig. 8)

Secure loose cable to the handles using the cable retainer (20).

Note:

 If using an electrical supply extension cable, it should 

be secured on the side of the switch. Ensure that the cable is 

not damaged or twisted before connected to the mower.

STARTING AND STOPPING (Fig. 9)

  1. Lift the handle up and tilt the unit to one side slightly to 

reduce the risk of lawn damage whilst starting.

  2. Depress the safety switch (10), and pull the switch lever (9) 

while the safety switch is depressed.

  3. Return the unit to its proper cutting position after running 

up to maximum speed, and start mowing.

  4. To stop, release the switch lever.

MOWING (Fig. 10)

WARNING!

 Do not attempt to operate your mower with 

one hand.

Refer the recommended directional method of operation to 

obtain maximum mowing performance and to reduce the risk 

of the trailing extension cable from entering the cutting path.

Note:

 Make sure the extension cable near the switch lever is 

looped through the cable retainer before mowing. 
  1. Place the bulk of the cable on the lawn close to the 

starting point  1  .

  2. Proceed down the cutting area as shown in (Fig10-A), 

working from position 1 towards position 2 and, on 

reaching position  2 , turn to the right and proceed 

towards position 3 . Continue to the end of the cutting 

area, turn to the left, and proceed towards position 4 . 

Note:

 Always working away from the cable. Do not adopt the 

method shown in (B), working towards the cable, as this can 

be dangerous.

MAINTENANCE

WARNING!

 Before any inspection, maintenance or 

cleaning of the mower is conducted, ensure that the 

cutting blade has fully stopped rotating, and the mower is 

disconnected from the mains power supply.

BEORE EACH USE

  1. Remove any grass and debris from around the cutting 

height adjustment lever, the air filter in the cowl and the 

underside of the mower deck.

  2. Ensure the grass collection bag is empty, and inspect for 

signs of damage.

  3. Check the condition of the rear deflector, along with the 

mower deck.

  4. Inspect the condition of the cutting blade - note: wear 

strong gloves when working with or around the cutting 

blade.

  5. Ensure that the cutting blade is not bent or cracked.

  6. Check the condition of the blade and it’s mountings.

  7. Check that the fixing bolt is secure.

  8. Check the power supply cable.

  9. Inspect the ‘Switch control & safety button’.

 10. Check that all securing nuts and bolts are tight.

WARNING!

 If signs of damage are found, the mower 

unit should not be used until fully repaired by a qualified 

person.

GENERAL MAINTENANCE

  1. Remove all grass debris from the top and underside of 

the mower deck, as well as from around the ventilation 

holes, immediately after use - note: wear strong gloves 

when working with or around the cutting blade.

  2. Motor unit - this motor unit is maintenance free and 

should  not  be  accessed  by  anyone  other  than  an 

approved maintenance engineer.

  3. Switch control & safety button - is maintenance free and 

should not be accessed by anyone other than a approved 

maintenance engineer.

REPLACING THE CUTTING BLADE

Follow  the  procedure  described  in  “CUTTING  HEIGHT 

ADJUSTMENT”, remove the damaged or worn blade and fit a 

new blade.

Notes:

•  The cutting blade has sharp edges, always wear strong 

gloves to protect your hands when working with or around 

the cutting blade.

•  Always work away from the cutting edges of the blade to 

avoid the risk of injury.

•  Care should be taken when turning or lifting the mower 

unit.

•  Damaged or worn blade should be replaced immediately.

WARNING!

 To ensure safety and reliability, all repairs 

should be performed by an AUTHORIZED SERVICE 

CENTER or other QUALIFIED SERVICE ORGANIZATION.

SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.

Summary of Contents for HM-3400

Page 1: ...6986301 STD 06 11 ...

Page 2: ... 1 9 10 17 18 19 18 17 19 17 18 19 8 12 7 4 5 6 1 6 7 13 1 2 3 4 17 19 18 18 17 16 20 1 4 5 3 2 6 7 12 8 9 10 11 1 2 3 4 5 6 7 8 9 10 14 15 A B 20 21 ...

Page 3: ... personal injury e Do not overreach Keep proper footing and balance at all times This enables better control of the power tool in unexpected situations f Dress properly Do not wear loose clothing or jewel lery Keep your hair clothing and gloves away from moving parts Loose clothes jewellery or long hair can be caught in moving parts g If devices are provided for the connection of dust extraction a...

Page 4: ...e ground 16 Switch on the lawnmower according to instructions and with feet well away from the blades 17 Do not put hands or feet near or under rotating parts Keep clear of discharge opening at all times 18 Never pick up or carry the lawnmower while the motor is running 19 Keep all nuts bolts and screws tight to be sure that the lawnmower is in safe working condition 20 Check the grass catcher fre...

Page 5: ...ion 2 turn to the right and proceed towards position 3 Continue to the end of the cutting area turn to the left and proceed towards position 4 Note Always working away from the cable Do not adopt the method shown in B working towards the cable as this can be dangerous MAINTENANCE WARNING Before any inspection maintenance or cleaning of the mower is conducted ensure that the cutting blade has fully...

Page 6: ... 5 NOTE ...

Page 7: ... 6 NOTE ...

Page 8: ... it was not designed or is not suited and no repairs alterations or modifications have been attempted by other than an Authorised Service Agent This guarantee will not apply if the tool is damaged by accident or if repairs arise from normal wear and tear Accessories such as bits blades sanding discs cutting lines etc are excluded from this guarantee Normal consumable parts such as carbon brushes b...

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